Being smart about market expansion has helped this company become an industry leader.The days when you had to rely on two human beings yelling at each other across a trading floor to buy 100 shares of stock are long gone, and the electronic trading platforms that have largely replaced voice trading have transformed Wall Street and global financial markets. Tradeweb Markets (TW +2.06%) has been a leader in the electronic trading transition, and it continues to push forward for new innovations to make trading ...